﻿
var dateFormat = function () {
    var token = /d{1,4}|m{1,4}|yy(?:yy)?|([HhMsTt])\1?|[LloSZ]|"[^"]*"|'[^']*'/g,timezone = /\b(?:[PMCEA][SDP]T|(?:Pacific|Mountain|Central|Eastern|Atlantic) (?:Standard|Daylight|Prevailing) Time|(?:GMT|UTC)(?:[-+]\d{4})?)\b/g,timezoneClip = /[^-+\dA-Z]/g,pad = function (val, len) {
        val = String(val);
        len = len || 2;
        while (val.length < len) val = "0" + val;
        return val;
    };
    // Regexes and supporting functions are cached through closure   
    return function (date, mask, utc) {
        var dF = dateFormat;
        // You can't provide utc if you skip other args (use the "UTC:" mask prefix)   
        if (arguments.length == 1 && (typeof date == "string" || date instanceof String) && !/\d/.test(date)) {
            mask = date;
            date = undefined;
        }
        // Passing date through Date applies Date.parse, if necessary   
        date = date ? new Date(date) : new Date();
        if (isNaN(date)) throw new SyntaxError("invalid date");
        mask = String(dF.masks[mask] || mask || dF.masks["default"]);
        // Allow setting the utc argument via the mask   
        if (mask.slice(0, 4) == "UTC:") {
            mask = mask.slice(4);
            utc = true;
        }
        var _ = utc ? "getUTC" : "get",d = date[_ + "Date"](),D = date[_ + "Day"](),m = date[_ + "Month"](),y = date[_ + "FullYear"](),H = date[_ + "Hours"](),M = date[_ + "Minutes"](),s = date[_ + "Seconds"](),L = date[_ + "Milliseconds"](),o = utc ? 0 : date.getTimezoneOffset(),flags = {
            d: d,
            dd: pad(d),
            ddd: dF.i18n.dayNames[D],
            dddd: dF.i18n.dayNames[D + 7],
            m: m + 1,
            mm: pad(m + 1),
            mmm: dF.i18n.monthNames[m],
            mmmm: dF.i18n.monthNames[m + 12],
            yy: String(y).slice(2),
            yyyy: y,
            h: H % 12 || 12,
            hh: pad(H % 12 || 12),
            H: H,
            HH: pad(H),
            M: M,
            MM: pad(M),
            s: s,
            ss: pad(s),
            l: pad(L, 3),
            L: pad(L > 99 ? Math.round(L / 10) : L),
            t: H < 12 ? "a" : "p",
            tt: H < 12 ? "am" : "pm",
            T: H < 12 ? "A" : "P",
            TT: H < 12 ? "AM" : "PM",
            Z: utc ? "UTC" : (String(date).match(timezone) || [""]).pop().replace(timezoneClip, ""),
            o: (o > 0 ? "-" : "+") + pad(Math.floor(Math.abs(o) / 60) * 100 + Math.abs(o) % 60, 4),
            S: ["th", "st", "nd", "rd"][d % 10 > 3 ? 0 : (d % 100 - d % 10 != 10) * d % 10]
        };
        return mask.replace(token, function ($0) {
            return $0 in flags ? flags[$0] : $0.slice(1, $0.length - 1);
        });
    };
} ();
// Some common format strings   
dateFormat.masks = {
    "default": "ddd mmm dd yyyy HH:MM:ss",
    shortDate: "m/d/yy",
    mediumDate: "mmm d, yyyy",
    longDate: "mmmm d, yyyy",
    fullDate: "dddd, mmmm d, yyyy",
    shortTime: "h:MM TT",
    mediumTime: "h:MM:ss TT",
    longTime: "h:MM:ss TT Z",
    isoDate: "yyyy-mm-dd",
    isoTime: "HH:MM:ss",
    isoDateTime: "yyyy-mm-dd'T'HH:MM:ss",
    isoUtcDateTime: "UTC:yyyy-mm-dd'T'HH:MM:ss'Z'"
};
// Internationalization strings   
dateFormat.i18n = {
    dayNames: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat","Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"],
    monthNames: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec","January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"]
};
// For convenience...   
Date.prototype.format = function (mask, utc) {
    return dateFormat(this, mask, utc);
};  

